我正在编写该服务器是多线程的客户端服务器程序,我想使用while()在我的线程中创建循环,但是它在myhthread.cpp中得到以下错误:
“预期在'ID'之前的')'”
我知道我的问题是基本的,但我对此感到非常困惑...如何为它创建循环?这是我的代码:
mythread.h
#ifndef MYTHREAD_H
#define MYTHREAD_H
#include <QThread>
#include <QMainWindow>
#include <QTcpServer>
#include <QTcpSocket>
#include "myserver.h"
#include <QDebug>
class mythread : public QThread
{
Q_OBJECT
public:
mythread(qintptr ID, QObject *parent) :
QThread(parent)
{
this->socketDescriptor = ID;
}
void run()
{
qDebug() << " Thread started";
socket = new QTcpSocket();
if(!socket->setSocketDescriptor(this->socketDescriptor))
{
emit error(socket->error());
return;
}
// if (m_client)
connect(socket, SIGNAL(readyRead()), this, SLOT(readyRead()), Qt::DirectConnection);
connect(socket, SIGNAL(disconnected()), this, SLOT(disconnected()));
qDebug() << socketDescriptor << " Client connected";
exec();
}
signals:
void error(QTcpSocket::SocketError socketerror);
public slots:
void readyRead();
void disconnected();
private:
QTcpSocket* socket;
qintptr socketDescriptor;
};
#endif
mythread.cpp:
#include "mythread.h"
#include "myserver.h"
mythread(qintptr ID, QObject *parent) :
{
while(disconnected)
{
mythread::run();
}
}
void mythread::readyRead()
{
QByteArray Data = socket->readAll();
qDebug()<< " Data in: " << Data;
socket->write(Data);
}
void mythread::disconnected()
{
qDebug() << " Disconnected";
socket->deleteLater();
exit(0);
}
最佳答案
在cpp中的构造函数的定义中使用范围解析,并在行末尾摆脱:
:
mythread::mythread(qintptr ID, QObject *parent) // :
{
...
}
如果没有
mythread::
前缀,则编译器会理解您要声明mythread
类型的某个对象,并且语法感到困惑。编辑:正如Danh所指出的,,纠正错误后,编译器将引起您的注意,即您具有同一构造函数的两个定义,这是非法的。
可能的更正:,应清除所有函数实现的 header 中的类声明,并将实现移至cpp文件。由于构造函数有两种不同的实现,因此可以尝试将两种方法合并:
//in the header: no implementation of functions
class mythread : public QThread
{
...
mythread(qintptr ID, QObject *parent);
void run();
...
};
// in the cpp
mythread(qintptr ID, QObject *parent)
: QThread(parent)
{
this->socketDescriptor = ID;
while(disconnected) // if you really want to do this during the construction
{
mythread::run();
}
}
void mythread::run()
{
...
}